<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域-->
      <div class="avatar_box">
        <img src="../assets/logo.png" />
      </div>
      <el-form ref="loginFormRef" class="login_form" label-width="0px" :model="loginForm" :rules="loginFormRules">
        <el-form-item prop="username">
          <el-input prefix-icon="el-icon-s-custom" placeholder="请输入用户名" v-model="loginForm.username">用户名</el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input prefix-icon="el-icon-lock" placeholder="请输入密码" v-model="loginForm.password">密码</el-input>

          <el-button type="info" class="btn" @click="resetLoginForm">重置</el-button>
          <el-button type="primary" class="btn" @click="login">登录</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        loginForm: {
          username: '',
          password: ''
        },
        loginFormRules: {
          username: [{
              required: true,
              message: '请输入用户名',
              trigger: 'blur'
            },
            {
              min: 2,
              max: 10,
              message: '长度在 2 到 10 个字符',
              trigger: 'blur'
            }
          ],
          password: [{
              required: true,
              message: '请输入密码',
              trigger: 'blur'
            },
            {
              min: 2,
              max: 10,
              message: '长度在 2 到 10 个字符',
              trigger: 'blur'
            }
          ],
        }
      }
    },
    methods: {
      resetLoginForm() {
        console.log(this);
        this.$refs.loginFormRef.resetFields();
      },
      login() {
        this.$refs.loginFormRef.validate(async valid => {
          console.log(valid);
          if (!valid) return;
          const {
            data: res
          } = await this.$http.get('/v1/user/login', {
            params:{
              username:this.loginForm.username,
              password:this.loginForm.password
            }
          });
          console.log(res);
          if (res.code !== 200) {
            this.$message.error('登录失败')
            return;
          }else{
             this.$message.success('登录成功');
             //1.将登陆成功之后的token，保存到客户端的sessionStorage中
             //1.1项目中除了登录以外的其他api接口，必须在登录之后才能访问
             //1.2token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
             //2.通过编程式导航跳转到后台主页，路由地址是/home
             console.log(res);
             window.sessionStorage.setItem('token', res.data.token);
             this.$router.push('/home');
          }
        })
      }
    },

  };
</script>

<style lang="less" scoped>
  .login_container {
    background-color: #2b4b6b;
    height: 100%;
  }

  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar_box {
      height: 130px;
      width: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;

      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }

  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0% 3% 5%;
    box-sizing: border-box;

    .btn {
      display: flex;
      justify-content: flex-end;
      margin-right: 10px;
      margin-top: 15px;
      float: right;
    }

  }
</style>
